Method of producing coils of flexible material and coils and core members relating to same



Oct. 16, 1928.

1,687,938 R. MCC. JOHNSTONE ETHOD OF PRODUCING COILS 0F FLEXIBLEMATERIAL AND COILS AND CORE ME BERS RELATTNG M TO SAME Filed Nov. 22,1926 2 Sheets-Sheet 1 INVENTOR Oct. 16, 1928. R. MCC. JOHNSTONE METHODOF PRODUCING COILS OF FLEXIBLE MATERIAL AND COILS AND CORE MEMBERSRELATING TO SAME Filed Nov. 22., 1926" 2 Sheets-Sheet ill lllhlh-IIIHMPII lllllllll llllllll lllll l l l ATTORN EY Patented 0a. 16,"1928. 1

UNITED STATES PATENT OFFlCEu onner MoG. :ronnsronn, or ROSELLE PARK,nnwmnsny, Assmnonro CAMERON MACHINE COMPANY, or BROOKLYN, new YORK, nconronnrron OF NEW romp METHOD OF PRODUCING COILS OF FLEXIBLE MATERIALAND COILS AND CORE MEMBERS RELATING TO SAME.

Application filed November 22, 1926. Serial No. 150,124.

This invention relates generally to a method of producing coils offlexible material, to the coils thus produced and to the core member forsupporting the coils.

In the art of producing coils of flexible material it is now the customto provide individual cores, usually of card-board tubing or the like.It will be appreciated that, when slitting material into a great manysections such as a 42 Wide web into forty-two sections, the threading ofthe material with respect to these cores presents quite a problem andrenders interweaving of adjacent coils extremely likely. It is the mainobject and feature of this invention to render the threading of the webmore easy of accomplishment and the separation of the coils morecertain.

In the accompanying drawings the invention is disclosed in a concreteand preferred form in which:

Fig. 1 is an end view, partly in section, of one form of device toproduce reduced portions, in a core member.

Fig. 2 is a side View of Fig. 1, partly in section.

Fig. 3 is a perspective View of a core member made according to myinvention.

Fig. 4 is a somewhat diagrammatic view of a typical slitting and windingmachine that may be used in connection with my invention.

Fig. 5 is a longitudinal sectional View of a core member with coils offlexible material in position thereon, some of the coils being shownseparated from the coil group.

Fig. 6 is a view in side elevation of a modified form of core memberthat may be employed in the practice of the invention.

Fig. 7 is a cross-sectional view substantially on the plane of line 77of Fig. 6.

1 indicates a core member having unreduced portions 2 and reducedportions 3, the latter at points in spaced relation corresponding to thewidth of sections of flexible material to be wound on the unreducedportions. lthis member may be made in any suitable way as by molding orotherwise and may be of any suitable material. Preferably it IS made ofwood and the reduced portions are produced by partly severing the coremember in line with the slitters of the slitting machine for the web offlexible material. WVhen such a core member is inserted in a windingmachine, and sections of flexible material are wound on the unreducedportions of such core member the product shown in Fig. 5 will beproduced, and when it is thereafter desired to separate coils 4 it isonly necessary to complete the severing operation of the core member asby snapping off the thin stems or re duced portions of the core member.

In Figs. 1 and 2 is shown a device for partly severing the core member.As here shown 5 indicates a Work-holder in which are pockets 6 toreceive solid round rods 7 and this workholder isturned until a rod isbrought under spring 8 and in between knurled rollers 9. 10 is arotating carrier having a plurality of saw blades 11 that are spacedsimilar to the slitting members of the slitting and winding machine inwhich the core member is to be used, and when the rod is brought inunder spring 8 the saws are brought into action to partly sever the rodat a plurality of points, the knurled rollers rotating the rod duringthe sawing operation. When the sawing operation is completed work-holder5 is turned thereby discharging a core member as shown at the right-handside of Fig. 1 and bringing a new rod under the saws.

The core member thus produced is inserted into a slitting and windingmachine as shown in Fi 4, care being taken thatthe reduced portions arein alinement with the slitting members one of which is shown at 12, andsections of flexible material 13 then being wound simultaneously on theunreduced portions of the core. During this operation the core may besupported by winding drums 14 and. 15. After the winding operation iscompleted the product shown in Fig. 5 is ob tained, and when it isdesired to separate the coils it is only necessary to snap Off the rcdu-.ed portions.

in Figs. 6 and 7 is shown a modified form of core member. Here slots 16are cut in the rods, connecting portions 17 being left at one side ofthe periphery instead of centrally of the rod.

I claim:

1. The method of producing wound coils of material which consists in:forming a core member with reduced portions at points in spared rclationi'fiorresponding to the width of the coils to be produced, winding aplurality of sections of flexible material on unreduced portions of saidcore member, and then severing the reduced portions aforesaid to produceindividual coils.

2. The method of producing wound coils of material which consists in:forming reduced portions on a core member by partly severing it atpoints in spaced relation corresponding to the width of the coils to beproduced, winding a plurality of sections of flexible materialsimultaneously on unre duced portions of the core member, and thencompleting the severing operation of the core member between the coils.

3. As a new article of manufacture a core member having unreducedportions and partly severed portions, the latter at points in spacedrelation corresponding to the width of sections of flexible material tobe Wound on the unreduced portions of the core member.

4., The combination with a core member having unreduced portions andpartly severed portions, the latter at points in spaced relationcorresponding to the width 01 sections of flexible material to be woundon the unreduced portions of the core member, of sections of flexiblematerial Wound into coil formation on the unrcduccd portions of the coremember. a v

Signed at New York city, in the borough of Brooklyn, county 01 Kin s andState of New York, this 9 day of November, 1926.

ROBERT MGC. J OHNSTONE.

